Scientists have observed a strange phenomenon in oceans worldwide: Fish are getting smaller, even in areas unaffected by overfishing. The exact reason is unknown, though researchers have a few ...

A collaborative team of scientists recently found that there is no physiological evidence supporting a leading theory -- which involves the surface area of fish gills -- as to why many fish species ...

A widely debated topic in biology and fisheries sciences is the role of oxygen in the growth of fish and other water-breathing animals. According to new research, developmental changes in individual ...

When you and I take a deep breath, we pull air into our lungs. That’s because humans are mammals. But fish aren’t mammals. They usually don’t breathe air. They usually don’t have lungs. That’s what I ...

Fish can suffocate and die from oxygen deprivation, even when surrounded by water. This occurs when dissolved oxygen levels are too low due to pollution, heat, or other environmental factors, or if ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Some teenage Japanese eels have found a way to avoid becoming a fish ...

Humans' outer ears may have evolved from the gills of prehistoric fish, a new study finds. Gene-editing experiments indicate ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. ‘Lungfish’ would have been a common sight in the Devonian ...

The middle ear of humans evolved from fish gills, according to a study of a 438 million-year-old fossil fish brain. Scientists discovered the fossil of the braincase of a Shuyu fish. Despite its skull ...

The outer ear is unique to mammals, but its evolutionary origin has remained a mystery. According to a study published in Nature from the USC Stem Cell lab of Gage Crump, this intricate coil of ...